. Author manuscript; available in PMC: 2010 Oct 1.

Published in final edited form as: Am Heart J. 2009 Oct;158(4 Suppl):S31–S36. doi: 10.1016/j.ahj.2009.07.016

Table 5.

Multivariable Analysis of V_E/V_CO2 on CPX.

Variable	Coefficient	95% Confidence Interval	Partial R-square	P-value

Age	0.14	(0.11, 0.17)	0.04	<0.0001

BMI	−0.22	(−0.27, −0.17)	0.03	<0.0001

ECG vent. cond.			0.01 (overall)	<0.0001 (overall)
IVCD	2.2	(1.1, 3.3)
LBBB	1.3	(0.3, 2.3)
Paced	1.9	(0.9, 2.8)
RBBB	3.3	(1.5, 5.2)

LVEF	−0.16	(−0.20, −0.11)	0.02	<0.0001

NYHA Class (II vs. III/IV)	3.4	(2.8, 4.2)	0.04	<0.0001

Reference categories for categorical variables: NYHA Class = Class II, ECG ventricular conduction = normal conduction

Overall model R² = 0.19.